Помогите составить 4 диалога со словами May, mest, can.

1.

-May I leave?

-Yes, you may, but you must do that in the break time.

2.

-Will you go swimming today?

-I must, but I'm not sure I can.

3.

- May I ask a question, sir?

- Yes, of course you can.

4.

-You must not copy homework from the other students.

-But how can we get good grades then?